Crystal Structure, Magnetism, and Dielectric Properties of La<SUB>1−<I>x</I></SUB>Bi<I><SUB>x</SUB></I>Ni<SUB>0.5</SUB>Mn<SUB>0.5</SUB>O<SUB>3</SUB>
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- Kobayashi Yoshihiko
- Department of Applied Physics and Chemistry, The University of Electro-Communications
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- Shiozawa Masanori
- Department of Applied Physics and Chemistry, The University of Electro-Communications
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- Sato Keisuke
- Department of Applied Physics and Chemistry, The University of Electro-Communications
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- Abe Kohji
- Department of Applied Physics and Chemistry, The University of Electro-Communications
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- Asai Kichizo
- Department of Applied Physics and Chemistry, The University of Electro-Communications
Bibliographic Information
- Other Title
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- Crystal structure, magnetism, and dielectric properties of La1-xBi[x]Ni0.5Mn0.5O3
- Crystal Structure, Magnetism, and Dielectric Properties of La<sub>1-<i>x</i></sub>Bi<sub><i>x</i></sub>Ni<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub>
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Abstract
We have synthesized the polycrystalline La1−xBixNi0.5Mn0.5O3 for x=0–0.9 by soft chemical synthesis, and investigated the crystal structure, and the magnetic and the dielectric properties. The crystal has a monoclinic P21⁄c structure with centrosymmetry for 0≤x≤0.7, and has a monoclinic C2 structure with non-centrosymmetry for 0.8≤x≤0.9 at room temperature. The ferromagnetic Curie temperature (TCM) decreases monotonically from 300 K at x=0 to 150 K at x=0.9, while the Ni2+–Mn4+ configuration is kept independent of Bi-content. For x≥0.5, An anomalous increment of the dielectric constant with increasing temperature and the maximum in the dielectric loss accompanied with frequency dispersion were observed around 150 K, which is close to TCM. However, no evidence showing a ferroelectric ordering was observed below 400 K. For x=0.7, the increment of the dielectric constant induced by the magnetic field is 7% at TCM at 9 T. The temperature and the magnetic field dependence of the dielectric properties is discussed based on Maxwell–Wagner model assuming an inhomogeneity of samples and a negative magnetoresistance.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 77 (8), 084701-084701, 2008
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679174174336
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- NII Article ID
- 130005437041
- 110006914836
- 210000107378
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- NII Book ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 9617318
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed